Update Marlin to access M423

[Minner1337]

Since this version of Marlin is 2.0.9.2 X Axis Twist is a common issue with this style of Printers i'd recommend updating to atleast Version 2.0.9.4 and activating M423 (X Twist Compensation) to give people the ability to compensate for this issue as it makes leveling the printbed not possible as is without manually trying to bend the rods. Which is obviously not a good idea.

[smkent]

I've managed to integrate the upstream Marlin 2.0.9.2 repository history with Sovol's changes in my fork: https://github.com/smkent/sovol-sv06-plus-firmware

This could be used as a base to merge in successive Marlin versions while keeping Sovol's changes for the SV06 Plus.